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.TH IBLINKINFO 8 "" "" "OpenIB Diagnostics"
.SH NAME
IBLINKINFO \- report link info for all links in the fabric
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.SH SYNOPSIS
.sp
iblinkinfo <options>
.SH DESCRIPTION
.sp
iblinkinfo reports link info for each port in an IB fabric, node by node.
Optionally, iblinkinfo can do partial scans and limit its output to parts of a
fabric.
.SH OPTIONS
.sp
\fB\-\-down, \-d\fP
Print only nodes which have a port in the "Down" state.
.sp
\fB\-\-line, \-l\fP
Print all information for each link on one line. Default is to print a header
with the node information and then a list for each port (useful for
grep\(aqing output).
.sp
\fB\-\-additional, \-p\fP
Print additional port settings (<LifeTime>,<HoqLife>,<VLStallCount>)
.sp
\fB\-\-switches\-only\fP
Show only switches in output.
.sp
\fB\-\-cas\-only\fP
Show only CAs in output.
.SS Partial Scan flags
.sp
The node to start a partial scan can be specified with the following addresses.
.\" Define the common option -G
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.sp
\fB\-\-port\-guid, \-G <port_guid>\fP  Specify a port_guid
.\" Define the common option -D for Directed routes
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.sp
\fB\-D, \-\-Direct <dr_path>\fP     The address specified is a directed route
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Examples:
   \-D "0"          # self port
   \-D "0,1,2,1,4"  # out via port 1, then 2, ...

   (Note the second number in the path specified must match the port being
   used.  This can be specified using the port selection flag \(aq\-P\(aq or the
   port found through the automatic selection process.)
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.sp
\fBNote:\fP For switches results are printed for all ports not just switch port 0.
.sp
\fB\-\-switch, \-S <port_guid>\fP same as "\-G". (provided only for backward compatibility)
.sp
How much of the scan to be printed can be controled with the following.
.sp
\fB\-\-all, \-a\fP
Print all nodes found in a partial fabric scan.  Normally a
partial fabric scan will return only the node specified.  This option will
print the other nodes found as well.
.sp
\fB\-\-hops, \-n <hops>\fP
Specify the number of hops away from a specified node to scan.  This is useful
to expand a partial fabric scan beyond the node specified.
.SS Cache File flags
.\" Define the common option load-cache
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.sp
\fB\-\-load\-cache <filename>\fP
Load and use the cached ibnetdiscover data stored in the specified
filename.  May be useful for outputting and learning about other
fabrics or a previous state of a fabric.
.\" Define the common option diff
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.sp
\fB\-\-diff <filename>\fP
Load cached ibnetdiscover data and do a diff comparison to the current
network or another cache.  A special diff output for ibnetdiscover
output will be displayed showing differences between the old and current
fabric.  By default, the following are compared for differences: switches,
channel adapters, routers, and port connections.
.\" Define the common option diffcheck
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.sp
\fB\-\-diffcheck <key(s)>\fP
Specify what diff checks should be done in the \fB\-\-diff\fP option above.
Comma separate multiple diff check key(s).  The available diff checks
are: \fBsw = switches\fP, \fBca = channel adapters\fP, \fBrouter\fP = routers,
\fBport\fP = port connections, \fBlid\fP = lids, \fBnodedesc\fP = node
descriptions.  Note that \fBport\fP, \fBlid\fP, and \fBnodedesc\fP are
checked only for the node types that are specified (e.g. \fBsw\fP,
\fBca\fP, \fBrouter\fP).  If \fBport\fP is specified alongside \fBlid\fP
or \fBnodedesc\fP, remote port lids and node descriptions will also be compared.
.sp
\fB\-\-filterdownports <filename>\fP
Filter downports indicated in a ibnetdiscover cache.  If a port was previously
indicated as down in the specified cache, and is still down, do not output it in the
resulting output.  This option may be particularly useful for environments
where switches are not fully populated, thus much of the default iblinkinfo
info is considered unuseful.  See \fBibnetdiscover\fP for information on caching
ibnetdiscover output.
.SS Port Selection flags
.\" Define the common option -C
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.sp
\fB\-C, \-\-Ca <ca_name>\fP    use the specified ca_name.
.\" Define the common option -P
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.sp
\fB\-P, \-\-Port <ca_port>\fP    use the specified ca_port.
.\" Explanation of local port selection
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.SS Local port Selection
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Multiple port/Multiple CA support: when no IB device or port is specified
(see the "local umad parameters" below), the libibumad library
selects the port to use by the following criteria:
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.IP 1. 3
the first port that is ACTIVE.
.IP 2. 3
if not found, the first port that is UP (physical link up).
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If a port and/or CA name is specified, the libibumad library attempts
to fulfill the user request, and will fail if it is not possible.
.sp
For example:
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ibaddr                 # use the first port (criteria #1 above)
ibaddr \-C mthca1       # pick the best port from "mthca1" only.
ibaddr \-P 2            # use the second (active/up) port from the first available IB device.
ibaddr \-C mthca0 \-P 2  # use the specified port only.
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.SS Configuration flags
.\" Define the common option -z
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\fB\-\-config, \-z  <config_file>\fP Specify alternate config file.
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Default: /etc/infiniband-diags/ibdiag.conf
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.\" Define the common option -z
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.TP
.B \fB\-\-outstanding_smps, \-o <val>\fP
Specify the number of outstanding SMP\(aqs which should be issued during the scan
.sp
Default: 2
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.\" Define the common option --node-name-map
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\fB\-\-node\-name\-map <node\-name\-map>\fP Specify a node name map.
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This file maps GUIDs to more user friendly names.  See FILES section.
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.\" Define the common option -t
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\fB\-t, \-\-timeout <timeout_ms>\fP override the default timeout for the solicited mads.
.\" Define the common option -y
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.TP
.B \fB\-y, \-\-m_key <key>\fP
use the specified M_key for requests. If non\-numeric value (like \(aqx\(aq)
is specified then a value will be prompted for.
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.SS Debugging flags
.\" Define the common option -e
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.TP
.B \-e
show send and receive errors (timeouts and others)
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.\" Define the common option -h
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\fB\-h, \-\-help\fP      show the usage message
.\" Define the common option -v
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.TP
.B \fB\-v, \-\-verbose\fP
increase the application verbosity level.
May be used several times (\-vv or \-v \-v \-v)
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.\" Define the common option -V
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.sp
\fB\-V, \-\-version\fP     show the version info.
.SH EXIT STATUS
.sp
0 on success, \-1 on failure to scan the fabric, 1 if check mode is used and
inconsistencies are found.
.SH FILES
.\" Common text for the config file
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.SS CONFIG FILE
.sp
/etc/infiniband-diags/ibdiag.conf
.sp
A global config file is provided to set some of the common options for all
tools.  See supplied config file for details.
.\" Common text to describe the node name map file.
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.SS NODE NAME MAP FILE FORMAT
.sp
The node name map is used to specify user friendly names for nodes in the
output.  GUIDs are used to perform the lookup.
.sp
This functionality is provided by the opensm\-libs package.  See \fBopensm(8)\fP
for the file location for your installation.
.sp
\fBGenerically:\fP
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# comment
<guid> "<name>"
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\fBExample:\fP
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# IB1
# Line cards
0x0008f104003f125c "IB1 (Rack 11 slot 1   ) ISR9288/ISR9096 Voltaire sLB\-24D"
0x0008f104003f125d "IB1 (Rack 11 slot 1   ) ISR9288/ISR9096 Voltaire sLB\-24D"
0x0008f104003f10d2 "IB1 (Rack 11 slot 2   ) ISR9288/ISR9096 Voltaire sLB\-24D"
0x0008f104003f10d3 "IB1 (Rack 11 slot 2   ) ISR9288/ISR9096 Voltaire sLB\-24D"
0x0008f104003f10bf "IB1 (Rack 11 slot 12  ) ISR9288/ISR9096 Voltaire sLB\-24D"

# Spines
0x0008f10400400e2d "IB1 (Rack 11 spine 1   ) ISR9288 Voltaire sFB\-12D"
0x0008f10400400e2e "IB1 (Rack 11 spine 1   ) ISR9288 Voltaire sFB\-12D"
0x0008f10400400e2f "IB1 (Rack 11 spine 1   ) ISR9288 Voltaire sFB\-12D"
0x0008f10400400e31 "IB1 (Rack 11 spine 2   ) ISR9288 Voltaire sFB\-12D"
0x0008f10400400e32 "IB1 (Rack 11 spine 2   ) ISR9288 Voltaire sFB\-12D"

# GUID   Node Name
0x0008f10400411a08 "SW1  (Rack  3) ISR9024 Voltaire 9024D"
0x0008f10400411a28 "SW2  (Rack  3) ISR9024 Voltaire 9024D"
0x0008f10400411a34 "SW3  (Rack  3) ISR9024 Voltaire 9024D"
0x0008f104004119d0 "SW4  (Rack  3) ISR9024 Voltaire 9024D"
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.fi
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.SH AUTHOR
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.TP
.B Ira Weiny
< \fI\%ira.weiny@intel.com\fP >
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